Question

please answer this question​

Answer 1

Steps :

Step 1 : Draw a line segment AB = 6cm.

Step 2 : Draw rays AQ and BP parallel to each other and on opposite side of AB.

Step 3 : Mark 4+3 = 7 points on AQ and 7 on BP at equal distances, namely A1, A2, ___ A7 on AQ and B1,B2,___B7 on BP.

Step 4 : Join A7 to B and B7 to A.

Step 5 : Join A4 to B3 intersecting AB at C.

Answer 2

Answer:

Which of these belong to the same period?

B

A

Element 10 2

Atomic number a) A, B b) B, )C, A d) A, B and C

C

Explanation:

ANSWER

The elements B, C, D and E with atomic numbers 3, 5, 7 and 10 are Li, B, N and Ne. They belong to same period (i.e, second period).